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8280600: C2: assert(!had_error) failed: bad dominance

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Backport-of: de826ba18a5e98586029581c2d4bcd27334fbdd1
This commit is contained in:
Tobias Hartmann 2022-04-04 05:46:19 +00:00
parent 662ec01d82
commit e580f0e08b
2 changed files with 54 additions and 1 deletions
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2
src/hotspot/share/opto/loopTransform.cpp
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@ -1222,7 +1222,7 @@ Node *PhaseIdealLoop::clone_up_backedge_goo(Node *back_ctrl, Node *preheader_ctr
}
Node* PhaseIdealLoop::cast_incr_before_loop(Node* incr, Node* ctrl, Node* loop) {
Node* castii = new CastIINode(incr, TypeInt::INT, ConstraintCastNode::StrongDependency);
Node* castii = new CastIINode(incr, TypeInt::INT, ConstraintCastNode::UnconditionalDependency);
castii->set_req(0, ctrl);
register_new_node(castii, ctrl);
for (DUIterator_Fast imax, i = incr->fast_outs(imax); i < imax; i++) {

53
test/hotspot/jtreg/compiler/loopopts/TestCastIIMakesMainLoopPhiDead.java Normal file
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@ -0,0 +1,53 @@
/*
* Copyright (c) 2022, Red Hat, Inc. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* bug 8280600
* @summary C2: assert(!had_error) failed: bad dominance
* @run main/othervm -Xcomp -XX:CompileOnly=TestCastIIMakesMainLoopPhiDead TestCastIIMakesMainLoopPhiDead
*/
public class TestCastIIMakesMainLoopPhiDead {
int iArr[] = new int[0];
void test() {
int x = 8;
try {
for (int i = 0; i < 8; i++) {
iArr[1] = 9;
for (int j = -400; 1 > j; j++) {
iArr[j] = 4;
x -= 2;
}
}
} catch (ArrayIndexOutOfBoundsException e) {
}
}
public static void main(String[] k) {
TestCastIIMakesMainLoopPhiDead t = new TestCastIIMakesMainLoopPhiDead();
for (int i = 0; i < 3; i++) {
t.test();
}
}
}